Rf-A Unit And Bpf Board - Icom IC-756PROII Service Manual

10-8 RF-A UNIT AND BPF BOARD

D181
MMBV3700LT1
L121 C131
J101 68nH 0.1
from CTRL RX
unit J2 14VL
RL121 RL122
AHY103 R124 AHY103 5VL
DS111 D131
68
HRS-4160A MMBV3700LT1
L112 L111 C111
0.12µH 82nH 0.1
Q131
R121 R123
C115 C113 UN9211
15p 75p 47 150
J111
ATT2 ATT2
RANT
ATT1 ATT1
C145 14VL
0.1
XVRT
RL101
Q101
AHY103 D141
MMBV3700LT1 UN9211
C141
Q141 Q143 0.1 C171 C173
L141
UMH11N UN9211 0.0027 0.0015
330µH
1 6
2 5 L174
330µH
3 4
L171
330µH
R146
14VL
10k
D153
IC151
R162 L152 C154 µPC1678G C152 MMBV3700LT1 Q132
J151 R152
10 0.12µH 0.1 0.1 UN9211
PAI 5 4 15 R8V
from PA
OUT GND
unit J1 6 3
C156 GND GND R154
7 2
12p GND GND 180
8 1
VCC IN
Q151
R155
UMH11N
100k
1 6
Q153
2 5 UN9211 TRVI
R160
1k R156 C158
Q152 3 4
10k 0.1
2SA1576
T8V
5VL
Q901 Q902 Q903
UMH11N UMH11N XP4311
D901 D902
4 3 4 3 4 3 POFF
DAN222 DAN222
5 2 5 2 5 2
6 1 6 1 6 1
R934 10k
R901 4.7k
R902 4.7k
Q904 Q905
XP4311 XP4311
PREAMP ON 13.2V
4 3 4 3
OTHER 0V
5 2 5 2
C2001-2010
C2001 C2005
0.0047
6 1 6 1
C2002 C2006
C2003 C2007 C2009
PREAMP ON 13.2V
OTHER 0V C2004 C2008 C2010
POFF
J951 PRE1
14V PRE2
14V 14VL 14VL
AGC AGC AGC
8V 8VL 8VL
ALC ALC ALC
T8V T8V T8V
R8V R8V R8V
–5V –5V –5V
from MAIN-A
unit J811 5V L951 HF50ACC322513-B 5VL 5VL
TRVI TRVI
SATV SATV SATV
BLBV BLBV BLBV
BLAV BLAV BLAV
SCPL SCPL SCPL
GND
MDAT MDAT MDAT
MCK MCK MCK
BSTB BSTB BSTB
R182 C181 L181 L182
68 0.1 6.8µH 6.8µH
Selected 12.0V
Unselected 0V
IC903
B0
IC901 TD62783AF
BU4094BCF 16 9 10 J201
VS GND
1 4 B0S 8 11 BPFO
STR Q1 IN8 O8
2 5 B1S 7 12 R914 10 B1
D Q2 IN7 O7 D2001
3 6 B2S 6 13 R915 10 B2 L2002
CLK Q3 IN6 O6 MMBV3700LT1 12µH
15 7 B3S 5 14 R916 10 B3
OE Q4 IN5 O5
14 B4S 4 15 R917 10 B4 BPFI
Q5 IN4 O4
13 B5WS 3 16 R918 10 B5
Q6 D903 IN3 O3
DAN222
12 2 17 R919 10 B6
Q7 IN2 O2
11 1 18
Q8 IN1 O1
B5S
9
QS R2001
10 B6S
QS 100
D904 B1
DAN222
8
D2021 L2022
B7WS
MMBV3700LT1 5.6µH
B7S
IC902
BU4094BCFV 16
D905
1 4 DAN222 IC904
STR Q1
2 5 TD62783AF
D Q2
3 6 B8WS 1 18 R927 10 B7
CLK Q3 IN1 O1
15 7 B8S 2 17 R928 10 B8
OE Q4 IN2 O2
14 B9S 3 16 R929 10 B9 R2021
Q5 IN3 O3 100
13 B10WS 4 15 R930 10 B10W B2
Q6 IN4 O4
12 B10S 5 14 R931 10 B10
Q7 IN5 O5 D2041
11 6 13 L2042
Q8 IN6 O6 MMBV3700LT1 6.8µH
AT1S 7 12
IN7 O7
9 AT2S 8 11
QS IN8 O8
10 9 10
QS VS GND
ATT 0.6dB 12.0V
ATT 12.18dB 0V
8
ATT2
ATT 0.12dB 12.0V
ATT1
ATT 6.18dB 0V R2041
BPFI BPFI
100
B3
L262 C266 C270 L264 D262
J202
1.8µH 33p 33p 1.8µH MA77 D2061 L2062
B3 B3 MMBV3700LT1 3.3µH
B2 B2
IC905 D261
BU4094BCFV 16 MMBV3700LT1 C271 B1 B1
33p
1 4
STR Q1
2 5
D Q2
3 6
CLK Q3 R271
15 7
OE Q4 100
14 B6 R2061
Q5 100
13 B4
Q6 L282 C286 C290 L284 D282
12
Q7 1.5µH 22p 22p 1.5µH MA77 D2081
11 L2082
Q8 MMBV3700LT1 2.7µH
9 D281 J203
QS
10 MMBV3700LT1 C291 B4
QS 15p
B5 B5
8
R281
100 R2081
B7
100
L302 C306 C310 L304 D302
0.82µH 33p 33p 0.82µH MA77
D301 Display frequency (MHz)
filter Voltage(V)
MMBV3700LT1 C311
RANS 1.600000 ~ 1.999999 B1 11.3
10p
PR1S 2.000000 ~ 2.999999 B2 11.3
PR2S 3.000000 ~ 3.999999 B3 11.3 D341
4.000000 ~ 5.999999 B4 11.2 MMBV3700LT1
R301 6.000000 ~ 7.999999 B5 11.2
100
B8
L322 C326 C330 L324 D322
B10W
0.68µH 22p 22p 0.68µH MA77
D321
MMBV3700LT1
D361
MMBV3700LT1
D171
MMBV3700LT1
B9 B10
R321
100
POFF
PRE1
PRE2
14VL
AGC
8VL
ALC
T8V
R8V
–5V
5VL
SATV
BLBV
BLAV
SCPL
Display frequency (MHz) filter
0.003000 ~ 1.599999 B0
8.000000 ~ 10.999999 B6
11.000000 ~ 14.999999 B7
15.000000 ~ 21.999999 B8
22.000000 ~ 29.999999 B9
30.000000 ~ 49.999999 B10W
50.000000 ~ 54.000000 B10
54.000001 ~ 60.000000 B10W
D421 C491
MA77 0.1
L492
C411 D431 C432 D432 LR-395
0.1 MA77 0.1 MA77
L431 Q441 L442 L444 D443
BPF BOARD
150µH 2SK2171 4.7µH LR-408 MA77
C2006 C2010 L2004 D2002
180p 180p 12µH MA77
L441 L443 L491
Q442
LR-395 4.7µH LR-395
2SK2171
D441
C2011
MA77
27p
D442 Q445
D444 C481 D481
MA77 XP4311
MA77 220p MA77
6 1
5 2
C2026 C2030 L2024 D2022 R451 L453 C452
330p 330p 5.6µH MA77 47 330µH 0.1
4 3
C2031
56p
C453 R452 C455 R455
0.1 680 0.1 39
D772 R964
MA77 39 Q452
XP4311
IC451
µPC1658G
1 6
5 4
SETC VCC
C2046 C2050 L2044 D2042 6 3 2 5
82p 82p 6.8µH MA77 IN OUT
L452
7 2
BYPS SETE 100µH
8 1 3 4
BYPS GND
C2051
15p
D771
C2066 C2070 L2064 D2062 L772 L771
HSB88WS
120p 120p 3.3µH MA77 617DB-1327 617DB-1327
C2071
27p
R961
10 L962 L961 L754 L753
0.15µH 82nH 0.15µH 0.15µH
C2086 C2090 L2084 D2082
39p 39p 2.7µH MA77
C964 C962 C759
6
18p 68p 7p
4 1
IC961 C966
C2091
µPC2708T 0.1
33p 5 3 2
T8V
D534
MA77
L342 C343 D342
0.22µH 68p MA77
FI711a FI711b
L711
FL-315A FL-315A
LS-540
R712 D712 L713
18 MA77 LS-540
L712
LS-540
R341
100
C366 C370 D362
W361 47p 47p W362 MA77
AGC
T8V
R8V
14VL
R361
8VL
100
RX 0V
L752 TX 1.7V
POFF
R759 LS-484B
PRE1
Q722 2.2k
PRE2 XP4311
14VL 4 3 Q751
AGC C758 2SK882
0.0047
8VL 5 2
ALC
T8V 6 1
R8V
–5V
5VL
T8V
ALC
SATV SATV
BLBV
BLAV
SCPL SCPL
Scope ATT
maker ON
scope activate
scope ATT 0dB
L871 100µH
L872 100µH
3.8V L873 100µH
MKR
Q601 L666 L665 L664
L601 L602 L603 C606 2SK2171 LR-358 68nH 68nH
50nH 107nH 0.25-1.9-13TL 0.1
C668 C666
C609 C602 C604 7p 10p
Q602
120p 47p 15p
2SK2171
C607
9p
R632
1.5k
R612
560
L613
Q611 Q612 LS-541
2SK1740 2SK1740
L611 D631 D632
LR-362
1SV265 D635 1SV265
MA77
1 5 1
4
2 3 2
R614
560 L631
10µH
Q613 Q614
2SK1740 2SK1740 D633
1SV263
1.7V 11V
Q501 L566 D561 L565 L564
2SK2171 LR-358 MA77 68nH 68nH
L501 L502 L503 C506
50nH 107nH 0.1
0.25-1.9-13TL
D562 C568 C566
MA77 7p 10p
C509 C502 C504
120p 47p 15p
C507
Q502
9p
2SK2171 L568
R772 10µH
33
RX 2.8V
TX 2.4V R532
1.5k
R512
560 L513
Q511 Q512 LS-541
2SK1740 2SK1740
L511
D531 D532
LR-362 1SV265 D535 1SV265
MA77
1 5 1
4
2 3 2
L531
10µH
11.2V
Q513 Q514
2SK1740 2SK1740 D533
R537 C542
2.2k 0.0047 1SV263
L535 10µH
C724 0.0047 W941
RX 12V
R722 1.8k TX 0V C744
2.7V Q721
0.1
L721 3SK131 L722
D941
D721 C781 LS-484B C725 R724 RX 0.7V LS-484B L941 HSB88WS L942 R733 L741
MA77 0.1 100p 10 TX 0V LR-395 LR-358 6.8 LR-358
C941
0.0047
R727 RX 0.9V
10k TX 0V
C943
0.1
AGC R944 R943
820 270
T8V T8V
R8V R8V
14VL 14VL
8VL 8VL
A L812 L813
Q811 Q812 D831
Q801 L802 R807 C805 LS-484B C819 LS-484B R820 L831
2SK882 2SK882 HSB88WS
2SC4081 2.7µH 1k 0.0047 2p 15 LR-358
C813
10p
L755 R758 C751 R804
0.68µH 4.7 0.001 1k
R808
R803 1k
10k
8VS
R874
390k R862 R861
CP871 R873 2.2M 470k
B R876 R865 D861
100k
1k 6 2.2k MA2S111 8 3
7 – 1 +
5 2
+ –
IC871b 4 IC871a
NJM4558M NJM4558M
FI842
CFJ455K8
A B
0 dB 0.2V 0V O
10 dB 0.8V 0.8V
20 dB 1.4V 1.4V
30 dB 3.4V 3.7V
8VS 8VS
BLBV BLBV
BLAV BLAV
MKR
L667 C664 R663 C661
68nH 0.001 33k 39p
1LOB
R665
120 D-WATCH BAL 1 2 3 4
J481
Q661 OFF 0.4 0 4.7 4.8
MKR
2SC4673 left from PLL
0.4 0 4.7 4.8 unit J851
ON center 4.7 4.8 4.7 4.8
right 4.7 4.8 0.4 0
J661
14VB 1L0B from PLL
1
8VL unit J651
BLBV
R635 D636
Q631 10k MA2S111
2SC4081
2
C636 Q651 C652 L634
0.0047 2SK2171 27p 1mH
5 14VL
4
3
C637
0.0047
L633 L653
10µH LR-358
8.1V
L567 C564 R563 C561
J561
68nH 0.001 33k 39p
1LOA 1L0A
from PLL
unit J351
R565
120
Q561
2SC4673
R8V
3
8VL
BLAV
R535 D536 L530
Q531 10k MA2S111 10µH
4
2SC4081
12.6V
C536 Q551 C552 L534
0.0047 2SK2171 27p 1mH
5
4
3
C537
0.0047
RX 11.3V
1.1V TX 11.2V
L533
10µH
J711
T/R2IF
L742 R742 D742 C745 L701 R702
LR-395 15 1SV308 0.1 LS-484B 100
J741 P741
D741
HSB88WS W741
T/R2IF to MAIN-A
D743
unit J101
1SV308
W742
Q701
D702 2SK882 C704 R706 J901
MA77 0.0047 15
2L0 from PLL
C746 C705
RX 11.9V unit J81
0.1 0.1 TX 11.7V
R708 1k
R8V
14VL
8VL
L833
L832 LS-484B
LR-358 RX 6.6V
TX 6.5V
C834 J831
0.0047
Q831 S2LO S2L0 from PLL
2SK882 unit J901
R832
15
J841
S3LO S3L0 from PLL
IC841 unit J801
FI841 FI843
TA31136FN C844 C840 C841
SFECV13.35MAS SFECV13.35MAS
0.0047 7p 100p
1 16
OSCIN MIXIN
R848 1k 2 15
OSCOUT GND
R846 220 3 14
MIXOUT N-REC
4 13
VCC N-DET
R847 220 5 12
IFIN RSSI
6 11
DEC IFOUT
7 10
I FILOUT QUAD MEASUREMENT CONDITIONS
8 9
FILIN AFOUT DISPLAY FREQ. :14.10000MHz
MODE :USB
MEASURE :VOLTMETER
:OSCILLOSCOPE
BLBV
BLAV
RF-A UNIT
10 - 8